Screw clamp



A. SCHMIEDER SCREW CLAMP Feb. 24, 1931.

Filed-Jan. -18 0 e I O (E ma M E 0 M m d m 04% n 6 Patented Fat; 24,1931 f J N D S A I ALFRED scnmmnnn, or masrn'rmnnwvonx V 1 scR Ew'cLA rc p 1 Application ma January 18, 1930 fSeria1 No. 421,659,

- My'invention relates to improvements in ineans for clamping parts inposition to facilita te the securement or working thereof, such j as inthe art of woodworking'and'the same 5'ha's'for its objecttoprovide asimple,-efficient a and reliable device which is readily manipulated andsecured in position to exert a clamping action alonga plurality of linesof direc- V tion or at a plurality of points. '1'. Another object'of theinvention is tocprovide a device of the character specified in whichcertain of the clamping components thereof are capable of beingrelatively moved to exert conjointly a third clamping action 5 along aline of direction extending trans- 'j'versely relative to the linesofdirection of -said clamping component's.

Another object of the inventionis to pro- 'vide adevice of the'character specifiedin '2 which an attachment l may be readilyconnect'edv to'a pair .of clamps for causing posi- *tive movementthereof towards each other to z exert fat-clamping action'along a line'of directionextending transversely relative to the 7 i lines ofdire'ction of the-individual clamps.

Qther'objects will in partbe obvious and f Referring to the drawing theclamping [means-includes apairof clamps 1 0 and 12, Y

eachcomprising a standard 14 having a lower arm '16 secured thereonandupper' arm '18 slidable thereon. The outer end'r of lower arm 1 6 isprovided with a universally c swiveled abutment 20 adapted to-engage apiece or member to be clamped and the outer end of the upper arm 18 isprovided with a screw 22 threaded therethrough and having I auniversally swiveled abutment 24 cooperating with the abutment 20. Thetwo clamps J 10 and 12 are substantially'alike in construction. a "Theclamps 10 and 12 are connected to- Fig. 4 is-a sectionon the line ofFig. 2.-

actuating screw. i

gether. means 26" for moving the clamps towardeach other toconjointlyexert a clampngaction along a transverselline'g l The con-v necting'means 26 includes a pair'o'flarms 28 I and 30 preferablyiprovid ed withhooklike" orslotted endportions 32 and 34 adapted to J SA-TENF OFFICE qembracethe standards 14 to extend laterally towards each other andsecured to thestandards bytlie set screws 36; Themembers 28 and 30"arepivoted together at their inner" ends as indicated at 3 I v Eachmember32 and 34 is provided with a pair of rearwardlyextending ears orbrackets 40 between which are swiveled the nuts 42 and 44 u pon verticalaxes. A threaded actu ating member 46 meshes with thenuts 42land 44,the1n e n'r1ber 46 comprisingjpreferab ly left I a 7 threads asindicated at- 48 and 50' so that the device may bemore hand 'alidrighthand quickly clamped by mea'nsdof the crank 52."

The 'abutments 20' and 24 are preferably roughened or ribbed asindicated at 54'to'preduring the transverse clamping action.

; In operation, the actuating means 26 are readily secured to theclamping components c10 and 12 by engaging the slotted portions 32 and34 with the standardsl4 andsecuri'ng the "vent the clampfrom slippingover the work same by set screws 36fafter being slidably adjustedthereon. The clamping components 10 and 12'are then engaged withthe pieces of work by adjustment of thescrews 22. By rotating thescrew'46 the clamping compo- ,nents 10 and 12 move towards each other onpivot 38 withoutdanger of slipping relative to the work toeXjert a thirdclamping action along a transverse line and cause the pieces to befirmly pressed into'engagement with each ,otheratthe contiguous edgesthereof.

In myc'inve'ntion the clamping components 10' and 12 therefore formconjointly a third clamping component,,thereb-y rendering the devicemore universal and flexibleand enlarging the usefulness thereof. i I

Further, the clamping components'1O and 12 are connected by a pluralityof parallel connections, one ofwhich is pivotal and the otherof which isthe transversely extending Mydevice may be readily manipulated and ,largedrange of useiulness, andparticnlarly in connection with thefabrication of veneered g g of various joints, and the 7 working uponcurvedsnriiace;v

Having thus described my 1nvention what 1. A deviceof thecharacter'described com:

prising a pairof clamps including standards and. relatively adjustableclamping members thereon, members slidably adjlustablevlongitudinally ofsaidstandards, eachhavingrearwardly and laterally extending arms, thelateral arms being pivotally connected together at the contiguousendsthereofland means'co- 7 operating with. the rearward arms forswinging said clamps relative to each other.

2. A device of the character described com prising a pair ofclampsincluding, standards, arms relatively slidable on said, standards, andclamping. members at the, outer ends of said arms relatively adjustablethereon, laterally and rearwardly. extending; arms on each standardbetweensaid arms, the lateral arms being pivoted together at thecontiguous ends thereof, and means coactingwith the rear arms Vforf'swingin'gsaid'clamps about the pivot. v V 3. A device ofthe characterdescribed comprising a pair of clamps including standards, armsrelatively slidable on said standards, and clampingjmembers at the outerends of said arms andLrelativeI-yadjustable thereon, and an attachmentfor connecting-said clamps for pivoted movement, including portionsslidably engaging the standards for adj ,ustment longitudinally thereof,arms extending laterally fromsaid portions towards each other andpi'votally connectediat the contiguous ends, arms extending 'rearwardlyfrom said portions, and meanscoactingthere with for swinging saidclamps.

4. A device of the character described com-,

prising an attachment for swinging clamps towards each other to exert athird clamplng action including a. pa1r of members, eachhaving angularlydisposed arms, and a portion intermediate said arms, said portions beingadapted to engage the standardsof the clamps for sliding adjustmentlongitudinally thereof, certain of said arms extending towards eachother and pivotally' connected, and

means coacting with the remaining arms for swinging said members:relative to each other. 1 5. A device of the character describedcomprising apair of clamps including standards,

slotted members on said standards, each having rearwardly and laterallyextending arms,

I claim and desire to secure by Letters'Pateiit a 1s the lateral armsbeing pivotally connected together at the contiguous ends thereof,swiveled members carried by the rearward arms, and an actuating screwconnecting said swiveled members and meshing with certain of saidswiveled members.

6. A device of the character described comprising a pair of clampsincluding standards, slotted portions detachably engaging said standardsand each having rearwardly and. laterally extending arms, the lateralarms being pivotally connected together,

swiveled nuts carried by the rearward arms,

andan actuating screw having reversely di rected threaded portionsmeshing with said nuts. I

7;; A device of the? character described comprising a pair. of membershaving slotted portions for. slidably engaging the standards ofa pair ofclamps for adjnstmentv longi tndinallv of the standards,;armsextendinglaterally from said slottedportions and connected together forpivotal movement, rearwardly extending brackets on said slotted.portions, swiveled members on said brackets, and a threaded actuating,member connecting said swiveled'. members and meshingwith certain ;,ofsaidswiveled members.

8; A device of the. character described comprising a pairof clampsincluding stand-v ards and relatively-adj ,ustable clamping membersthereon, and members slidably-adjnstr able. longitudinally of saidstandards, each member having lateral portionsand portions rearwardlyther'seoflthe'portions of one. set

being connected together for pivotal move: ment, and the portions oi theother set having an actuating connection therebetween,

- 9,, A device of the character described comprising, a. pairofclampsincluding standards,. arms relatively-slidable on. said standards, andclamping members at theouter endsv of said arms relatively adjustablethereon, and lateral andrearward' portions on. each standard betweensaidarms, the portionsof; one-set being connected together for'pivotalmovement, and-portions of theother set having an actuatingconnectiontherebetween.

10. A device of the. character described comprising a pair 0t clampsincludingstand-e ards, arms relatively slidable on said standards, andclampingmembers at the outer ends of said arms andrelatively adjustablethere on, and an attachment for connecting said clamps ffor pivotalmovement, including: members slidably engaging the standards foradjustment longitudinally thereof, and portions projecting laterally andrearwardly from said last. named members, the projecting portions of oneset being connected to-::

gether for pivotal movement, and the portions of the other set having anactuating connection therebetween,

11. A device of the character described comprising a pair of clampsincludingstand- I ards and clampingmembers slidably engaging saidstandards, and an actuating attache 'ment including portions slidablyengaging said standards for adjustment thereonrela- Y tive to saidclamping members, spacing means 1 pivotally connecting said portions,and an actuating connection between said portlons in spaced relation tosaid spacing means.

a members, and an actuating connection be- V spaced relatlon to said a12. A device of the character described comprising an attachment forswinging clamps towards each other to exert a third clamping actionincluding members adapted to engage the standards of the clamps forsliding adjustment longitudinally thereof, spacing means pivotallyconnecting said tween said members in spacing means.

13. A device of the character described comprising an attachment forswinging clamps towards each other for exerting a third clamping action,including members adapted to engage the standards of the clamps forsliding adj ustment'longitudinally thereof, portions thereon pivotallyconnecting said members,- other portions thereon in spaced relation tothe first named portions, and an actuating connection between said lastnamed portions.

In testimony whereof, I have signed my I 7 name hereto.

ALFRED SOHMIEDER.

